On December 3, 2024, President Yoon Suk-yeol’s declaration of martial law dealt a profound shock to South Korean democracy. Yet in that moment of crisis, the square came alive once again—and at its center stood the youth. The lights, the flags, and the questions that followed have now been captured in a book. After the Square tells the story of young people who organized themselves to call for President Yoon’s resignation, created spaces for public dialogue, and put democratic values into action.